公 上酒短大峰 Velocity ratio for fix-axis gear train Modes: 1.With all axes parallel to each other 2.Only axes of input and output gears are parallel 3.Axes of input and output gears are not parallel 圆上泽支大学 Velocity ratio for fix-axis gear train With all axes parallel to each other 3 2=@=-2 3=@2-3 021 0322 3 2' 0423 0524 415= @=(- 223--223335 212223 212223 1313 Modes: 1. With all axes parallel to each other 2. Only axes of input and output gears are parallel 3. Axes of input and output gears are not parallel Velocity ratio for fix-axis gear train  With all axes parallel to each other 1 2 2 1 12 z z i      2' 3 3 2 2'3 z z i     4 5 5 4 45 3 4 4 3 3 4 z z i z z i             1 2' 3' 2 3 5 5 1 15 z z z z z z i     1 2' 3' 2 3 5 z z z z z z (1) 3   Velocity ratio for fix-axis gear train